Alert archive / Illinois / Areal Flood Warnings in 2019

Areal Flood Warning 3, NWS St. Louis, MO

February 7, 2019Clinton County, Marion County, Washington County, Illinois

NWS St. Louis, MO issued this areal flood warning at Feb 7, 2019, 5:04 AM CST for Clinton County, Marion County, Washington County, Illinois. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Feb 7, 2019, 5:04 AM CST (11:04 UTC)
Expired
Feb 7, 2019, 11:00 AM CST
In force
6 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

Counties Clinton County, IL, Marion County, IL, Washington County, IL

The radar

The St Louis radar (KLSX), 126 km from the middle of the area, began a volume at 11:05 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 11.1 hours before the alert went out and 356 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 2019-02-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 16 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2019-02-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 105 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
16 J/kg
Mixed-layer CIN
-193 J/kg
Mixed-layer LCL
563 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
105 m²/s²
0-3 km storm-relative helicity
244 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS St. Louis, MO wrote its last area forecast discussion before this areal flood warning went out at Feb 7, 4:24 AM CST, 40 minutes earlier.

Area forecast discussion, Feb 7, 4:24 AM CST, 40 minutes before
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Hazardous weather outlook, Feb 7, 4:57 AM CST, 7 minutes before
Hazardous Weather Outlook
National Weather Service Saint Louis MO
457 AM CST Thu Feb 7 2019

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-081200-
Adams IL-Audrain MO-Bond IL-Boone MO-Brown IL-Calhoun IL-Callaway MO-
Clinton IL-Cole MO-Crawford MO-Fayette IL-Franklin MO-Gasconade MO-
Greene IL-Iron MO-Jefferson MO-Jersey IL-Knox MO-Lewis MO-Lincoln MO-
Macoupin IL-Madison IL-Madison MO-Marion IL-Marion MO-Moniteau MO-
Monroe IL-Monroe MO-Montgomery IL-Montgomery MO-Osage MO-Pike IL-
Pike MO-Ralls MO-Randolph IL-Reynolds MO-Saint Charles MO-
Saint Clair IL-Saint Francois MO-Saint Louis City MO-Saint Louis MO-
Sainte Genevieve MO-Shelby MO-Warren MO-Washington IL-Washington MO-
457 AM CST Thu Feb 7 2019

This Hazardous Weather Outlook is for portions of eastern and
central Missouri as well as west central and southwest Illinois.

.DAY ONE...Today and tonight.

Freezing rain will continue across portions of central and northeast
Missouri and west central Illinois. See the Winter Weather Advisory
for more information.

There is a chance of thunderstorms across portions of southeast
Missouri and southwestern Illinois through Noon today. A few of the
storms may be strong to severe with the main threats being damaging
winds and isolated tornadoes.

Localized river flooding is possible due to periods of heavy rain
today and may cause some flooding of low-lying areas, especially for
parts of southeast Missouri and southwest Illinois. See the Flood
Watch for more information.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Snow is likely Sunday morning across the area. Snow accumulations of
1 to 2 inches are currently possible, but some uncertainty remains
and these amounts may change as the system nears.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report wintry precipitation type and
amounts to the National Weather Service, as well as any severe
weather due to thunderstorms.

Tilly

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 6, 6:57 PM CSTRiver Flood WarningLSXReynolds39 hr
Feb 6, 8:38 PM CSTRiver Flood WarningLSXCrawford, Washington4 days
Feb 6, 8:50 PM CSTDense Fog AdvisoryLSXCole, Crawford, Franklin, Gasconade, Iron, Jefferson and 10 more9 hr
Feb 7, 5:16 AM CSTAreal Flood AdvisoryLSXSaint Charles, Saint Louis, City of Saint Louis6 hr
Feb 7, 7:46 AM CSTRiver Flood WarningLSXLincoln23 hr
Feb 7, 9:02 AM CSTRiver Flood WarningLSXOsage11 hr
Feb 7, 10:57 AM CSTRiver Flood WarningLSXPerry, Sainte Genevieve68 hr
Feb 7, 2:26 PM CSTWind Chill AdvisoryLSXKnox, Lewis, Marion, Shelby19 hr
Feb 7, 6:22 AM CSTSpecial Weather StatementLSXRandolph23 min
Feb 7, 6:37 AM CSTSevere Thunderstorm WarningLSXWashington23 min
Feb 7, 11:36 AM CSTRiver Flood WarningLSXBrown21 days
Feb 7, 11:36 AM CSTRiver Flood WarningLSXMorgan, Pike21 days

Nearby

Areal Flood Warnings in Illinois, 2019Every areal flood warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.